Cholesterol and A1C often rise together—and fall together too. Learn which diet, exercise, and lifestyle changes move both numbers in the right direction.
Most brown spots on skin are harmless, but some need a doctor's attention. Learn what freckles, moles, and age spots look like and when to get one checked.
Ionic compounds melt at high temperatures because of strong electrostatic bonds. Learn how charge, ion size, and structure affect melting points in real-world materials.